Which statement describes the hallmarks of metabolic acidosis?

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Multiple Choice

Which statement describes the hallmarks of metabolic acidosis?

Explanation:
Metabolic acidosis shows a metabolic component driving the acidemia: bicarbonate (HCO3-) is low, which pulls the pH down. The body responds quickly by breathing faster to blow off CO2, so the PaCO2 falls as a compensatory mechanism. So the hallmark pattern is low HCO3-, low pH, and a reduced PaCO2 due to respiratory compensation. The statement that matches this is the one with low bicarbonate and low pH, with compensatory low PaCO2. The other descriptions describe alkalosis or a normal state, or reflect a primary respiratory alkalosis pattern, and don’t fit metabolic acidosis.

Metabolic acidosis shows a metabolic component driving the acidemia: bicarbonate (HCO3-) is low, which pulls the pH down. The body responds quickly by breathing faster to blow off CO2, so the PaCO2 falls as a compensatory mechanism. So the hallmark pattern is low HCO3-, low pH, and a reduced PaCO2 due to respiratory compensation.

The statement that matches this is the one with low bicarbonate and low pH, with compensatory low PaCO2. The other descriptions describe alkalosis or a normal state, or reflect a primary respiratory alkalosis pattern, and don’t fit metabolic acidosis.

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